Salviniaceae

Salviniaceae (/sælˌvɪniˈeɪsiˌiː/),^[1][2] is a family of heterosporous ferns in the order Salviniales.^[3] The Salviniaceae contain the two genera Azolla and Salvinia,^[4] with about 20 known species in total.^[5] The oldest records of the family date to the Late Cretaceous.^[6] Azolla was previously placed in its own family, Azollaceae, but research has shown Azolla and Salvinia to be sister genera with the likely phylogenic relationship shown in the following diagram.^[7]

Salviniales	Marsileaceae Marsilea Pilularia Regnellidium Salviniaceae Azolla Salvinia

Salviniaceae Temporal range: Late Cretaceous–Recent PreꞒ Ꞓ O S D C P T J K Pg N
Salvinia natans
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Salviniales
Family:	Salviniaceae Martinov
Genera
Azolla Salvinia

References

1. "Salvinia". The Chambers Dictionary (9th ed.). Chambers. 2003. ISBN 0-550-10105-5.
2. "Salviniaceae". Merriam-Webster.com Dictionary. Merriam-Webster. Retrieved 2022-05-08.
3. Alan R. Smith; Kathleen M. Pryer; Eric Schuettpelz; Petra Korall; Harald Schneider & Paul G. Wolf (2006). "A classification for extant ferns" (PDF). Taxon. 55 (3): 705–731. doi:10.2307/25065646. JSTOR 25065646.
4. Maarten J. M. Christenhusz; Xian-Chun Zhang & Harald Schneider (2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54. doi:10.11646/phytotaxa.19.1.2.
5. Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. 261 (3). Magnolia Press: 201–217. doi:10.11646/phytotaxa.261.3.1.
6. De Benedetti, Facundo; Zamaloa, María C.; Gandolfo, María A.; Cúneo, Néstor R. (2021-12-01). "The South American and Antarctic Peninsula fossil record of Salviniales (water ferns): Its implication for understanding their evolution and past distribution". Review of Palaeobotany and Palynology. 295: 104521. doi:10.1016/j.revpalbo.2021.104521. ISSN 0034-6667.
7. Nathalie S. Nagalingum; Michael D. Nowak & Kathleen M. Pryer (2008). "Assessing phylogenetic relationships in extant heterosporous ferns (Salviniales), with a focus on Pilularia and Salvinia" (PDF). Botanical Journal of the Linnean Society. 157 (4): 673–685. doi:10.1111/j.1095-8339.2008.00806.x.